Double-walled blastula, double-walled container and gas-controlled non-return flip cover

Abstract

A double-walled embryo tube, a double-walled container and a gas-controlled non-return flip cap. The double-walled container is blow molded from the double-walled embryo tube. The double-walled bottle includes a bottle mouth, an inner bottle, an outer bottle and a gas pressure space therebetween. The gas-controlled non-return flip cap is combined with the bottle mouth. The gas-controlled non-return flip cap includes a valve and an air inlet. The gas-controlled non-return flip cap has a continuous air flow path with the double-walled container. When the outer bottle is squeezed, the air pressure in the gas pressure space forces the valve to close the air inlet, preventing air from escaping, so that the air pressure is used to press the inner bottle, causing the inner bottle to deform and release its contents from the gas-controlled non-return flip cap. When the squeezing force on the outer bottle is released, the valve is released from the air inlet, and external air flows into the gas pressure space through the air inlet, maintaining the air pressure in the gas pressure space, and the outer bottle returns to its original shape, and the inner bottle remains deformed. In addition, the gas-controlled non-return flip cap can prevent air from entering the inner bottle, reducing the risk of contamination or oxidation of the contents.

Description

Technical Field

[0001] This invention relates to double-walled tubes made of polyethylene terephthalate (PET) and double-walled containers blown therefrom, and also includes pneumatically controlled check flaps. Background Technology

[0002] It is known that most liquid items such as beverages, seasonings, and medicines are packaged in plastic containers, which are low in packaging costs and convenient to use. However, when liquid items are poured out, air enters the remaining space inside the packaging container, which can cause the contents to deteriorate, especially for liquid items that are not disposable.

[0003] CN206187550U, "Double-walled Plastic Bottle for Preventing Air from Entering Bottled Liquid" (hereinafter referred to as Case 550), proposes a solution to the above-mentioned problem. The plastic bottle consists of an inner layer and an outer layer, with the bottom of the inner layer connected to the bottom of the outer layer; the inner layer wall is partially connected to the outer layer wall. The outer layer's spout has a vent hole penetrating the outer layer wall at a location not where the two layers are connected, and grooves on the threads or interlocking lines communicate with the vent hole. When the outer cap is opened to pour liquid, the bottle wall is squeezed forcefully by hand, causing both the inner and outer layers to contract simultaneously, and the liquid slowly flows out from the inner layer through the solution outlet. When the hand is released, the liquid stops flowing, the inner layer wall remains contracted, and simultaneously, outside air enters the gas space between the two layers through the air groove and vent hole, causing the inner layer wall to remain contracted while the outer layer wall expands to its original shape.

[0004] TW201801995A, "Multi-layered Synthetic Resin Bottle" (hereinafter referred to as Case 995), points out that Case 550 has the problem of insufficient filling of contents and excessive residual liquid. Therefore, it proposes a solution where the outer bottle is made with an outer nozzle, shoulder, body, bottom, and grounding portion, and can return to its original shape under external pressure. The shoulder, at least the portion connected to the outer nozzle, is polygonal, the body has a circular cross-section, and the bottom is polygonal with ridges connecting to the extension lines of the polygonal ridges of the shoulder. The inner container is made with a cylindrical inner nozzle disposed on the inner circumference of the outer nozzle, and an inner container cap body having a shape that follows the inner surface of the outer bottle; a vent is provided between the outer nozzle and the inner nozzle. Summary of the Invention

[0005] The inventors of this invention believe that the air intake and exhaust of a double-walled container should be controlled to allow users to squeeze the outer bottle wall with less effort and to make better use of the air pressure between the inner and outer bottles to expel the contents of the inner bottle, resulting in less liquid residue in the inner bottle and easier squeezing by the user. Therefore, this invention proposes a double-walled preform tube, a double-walled container formed therefrom, and a pneumatically controlled check valve.

[0006] This invention provides the following technical solution:

[0007] A double-walled embryonic tube includes: an endoderm and an ectoderm;

[0008] The inode is a tubular body formed by plastic molding, closed at the bottom and open at the top; it includes an inner bottle mouth, a bottle mouth rim extending radially outward from the inner bottle mouth, and a bottle mouth layer, an inner bottle neck, an inode shoulder, and an inode body formed sequentially below the bottle mouth rim; the outer diameter of the inner bottle neck is smaller than the outer diameter of the bottle mouth layer and the inner bottle shoulder; the bottle mouth rim and the bottle mouth layer have at least one air inlet communicating with the inner bottle neck; the inner bottle shoulder includes several longitudinal first ribs and several longitudinal second ribs, the second ribs being located between two adjacent first ribs; a groove is formed between each of the first ribs and the second ribs, the groove communicating with the inner bottle neck and the inode body;

[0009] The preform is a plastic-molded tubular body with a closed bottom and an open top. From top to bottom, it includes an outer bottle mouth, an outer bottle neck, a stop ring, an outer preform shoulder, and an outer preform body. The inner wall of the outer bottle mouth is provided with an upward-opening receiving groove. The inner wall of the preform is provided with several longitudinal flow guide grooves, which extend upward from the outer preform shoulder to the outer bottle mouth. The outer bottle neck is provided with an external thread with a notch.

[0010] The inner preform is fitted inside the outer preform, and the receiving groove receives the bottle neck; the air inlet, the inner neck, the groove, and the guide groove of the inner preform form an airflow passage.

[0011] A double-walled container, comprising:

[0012] The device includes an inner bottle neck and an outer bottle neck, the outer bottle neck surrounding the inner bottle neck; a bottle neck rim extends radially outward from the inner bottle neck, an inner bottle neck is formed below the bottle neck rim, an inner bottle shoulder is formed below the inner bottle shoulder, and an inner bottle layer is formed below the inner bottle shoulder; the inner bottle shoulder has several longitudinal grooves; the bottle neck rim has at least one air inlet communicating with the inner bottle neck; the inner wall surface of the outer bottle neck has an upward-opening receiving groove, the receiving groove receiving the bottle neck rim and forming a point-like weld; the outer wall of the outer bottle neck has a notched outer... The inner bottle has a threaded design, below which an outer shoulder is formed, and below which an outer bottle is formed. The inner wall of the outer bottle opening has several longitudinal flow channels extending to the outer shoulder. A pressure space exists between the inner and outer bottles. The air inlet, inner bottle neck, channels, and flow channels form an airflow passage connecting to the pressure space. When the outer bottle is subjected to external pressure, it deforms inward and elastically returns to its original shape. When the inner bottle is compressed, it gradually reduces its volume and deforms, never returning to its original shape.

[0013] A pneumatically controlled non-return hinged cover includes:

[0014] A cover body, a hinged cover connected to the cover body, a check valve disposed in the cover body, and a dispensing component disposed in the cover body;

[0015] The cap body is a plastic molded part, including a top and a skirt that is perpendicularly connected to the periphery of the top; the lower surface of the top is provided with an outer sealing ring, a short sealing ring and a long sealing ring from the outside to the inside, all concentrically; the skirt is provided with an internal thread with a notch; the top is provided with an annular air groove and an annular mounting groove; the annular mounting groove surrounds a support surface; the annular air groove is provided with an air passage; the support surface is provided with an injection hole at its center;

[0016] The check valve is an elastic plastic molded part that can physically deform and return to its original shape; the check valve includes an annular base, a thin sheet-like diaphragm that can move up and down elastically extending horizontally from the annular base; the annular base surrounds and connects a valve plate that can move up and down elastically, and the valve plate has a peripheral injection hole on its periphery; the check valve is installed in the annular mounting groove of the cover body with the annular base, the valve plate contacts the support surface and seals the injection hole, and the diaphragm extends into the annular gas groove;

[0017] The dispensing component is installed in the cover body, and the check valve is fixed between the cover body and the dispensing component; the dispensing component includes a dispensing nozzle; the dispensing component has an air inlet at the position corresponding to the valve, and the valve is stationary below the air inlet and covers the air inlet.

[0018] The beneficial effects of this invention are:

[0019] Squeezing the outer bottle causes the inner bottle to deform and lose volume, squeezing out its contents. During this process, the pneumatically controlled check valve prevents air from escaping from the pressure space and airflow channels, thus maintaining the air volume and pressure within the pressure space. The combined effect of outer bottle deformation and air compression causes the inner bottle to deform and lose volume, squeezing out its contents.

[0020] When the pressure on the outer bottle is released, the outer bottle elastically returns to its original shape, causing the previously compressed air pressure space to be released and expanded. The air in the airflow channel flows back into the air pressure space, and the suction generated by the air flow causes the valve to open the air inlet. External air passes through the air inlet and pushes open the valve, entering the air pressure space through the airflow channel, filling the air pressure space with air.

[0021] The reduced volume deformation of the inner bottle will not be reversed, and the pneumatically controlled check valve prevents external air from entering the inner bottle.

[0022] As more contents are released, the inner bottle deforms more and more (becoming smaller), creating a larger pressure space and more air inside. When the user squeezes the outer bottle with the same force, the outer bottle deforms by the same amount, generating enough air pressure to expel the contents from the inner bottle. In other words, as the contents of the inner bottle decrease, the user doesn't need to increase the force applied to the outer bottle, nor does the outer bottle need to increase its deformation, to still expel the contents from the inner bottle, eventually reaching near-empty state. Attached Figure Description

[0023] Figure 1 This is a three-dimensional view of the endoderm of the present invention.

[0024] Figure 2 This is a planar view of the endoderm of the present invention.

[0025] Figure 3 This is for Figure 2 Section III-III.

[0026] Figure 4 This is a top view of the endoderm of the present invention.

[0027] Figure 5 This is a longitudinal sectional view of the endoderm of the present invention.

[0028] Figure 6 This is a three-dimensional view of the outer embryo of the present invention.

[0029] Figure 7 This is a plan view of the ectoderm of the present invention.

[0030] Figure 8 This is for Figure 7 Sectional view of VIII-VIII.

[0031] Figure 9 This is a longitudinal sectional view of the outer embryo of the present invention.

[0032] Figure 10 This is an external view of the combination of the endoderm and ectoderm of the present invention.

[0033] Figure 11 This is for Figure 10 Sectional view of XI-XI.

[0034] Figure 12 This is for Figure 10 Sectional view of XII-XII.

[0035] Figure 13 This is for Figure 12 Section XIII-XIII.

[0036] Figure 14 This is for Figure 12 Sectional view of XIV-XIV.

[0037] Figure 15 This is one of the three-dimensional exploded views of the pneumatically controlled anti-reverse cover of the present invention.

[0038] Figure 16 This is a cross-sectional view of the cover body of the pneumatically controlled anti-reverse lifting cover of the present invention.

[0039] Figure 17 This is a cross-sectional view of the check valve of the pneumatically controlled non-return cover of the present invention.

[0040] Figure 18 This is a cross-sectional view of the injection component of the pneumatically controlled anti-reverse flap of the present invention.

[0041] Figure 19 This is the second exploded perspective view of the pneumatically controlled anti-reverse flap of the present invention.

[0042] Figure 20 This is an external view of the pneumatically controlled anti-reverse hinged cover of the present invention.

[0043] Figure 21 This is a cross-sectional view of the pneumatically controlled anti-reverse flap of the present invention.

[0044] Figure 22 This is a cross-sectional view of the combination of the pneumatically controlled check valve cap and the bottle mouth of the double-walled container according to the present invention.

[0045] Figure 23 This is a plan view showing the combination of the pneumatically controlled anti-reverse flap and the double-walled container of the present invention.

[0046] Figure 24 This is a schematic diagram of the double-walled container of the present invention releasing its contents under pressure.

[0047] Figure 25 This is a schematic diagram of the airflow and contents flow during the compression and release of contents in the double-walled container of the present invention.

[0048] Figure 26 This is a schematic diagram of the outer bottle of the double-walled container of the present invention returning to its original shape and the inner bottle undergoing volume reduction deformation.

[0049] Figure 27 This is a schematic diagram of airflow as the outer bottle of the double-walled container of the present invention returns to its original shape and the inner bottle undergoes volume reduction and deformation.

[0050] Figure 28 This is a schematic diagram of the double-walled container of the present invention, in which the inner bottle is deformed by reducing its volume and then pressing the outer bottle.

[0051] Figure 29 This is a schematic diagram of the outer bottle of the double-walled container of the present invention returning to its original shape and the inner bottle undergoing volume reduction deformation. Detailed Implementation

[0052] To facilitate the explanation of the central idea of ​​the invention as stated in the above-described description of the invention, specific embodiments are provided below. Various objects in the embodiments are depicted according to a scale, size, deformation, or displacement suitable for illustration, rather than being drawn to the scale of actual components, as will be stated prior. Furthermore, in the following description, identical and symmetrically arranged components are represented by the same designation.

[0053] The present invention includes a double-walled embryo tube 1, a double-walled container 3 formed by blowing the double-walled embryo tube 1, and a pneumatically controlled check flap 4 combined with the double-walled container 3.

[0054] The double-walled preform tube 1 includes an inner preform 10 and an outer preform 20, both of which are molded products made of polyethylene terephthalate (PET). The outer preform 20 is fitted over the inner preform 10.

[0055] like Figures 1 to 5 The inner body 10 is a tubular body with a closed bottom and an open top, including an inner neck 11, from which a neck rim 12 extends radially outward. Below the neck rim 12, a neck layer 13, an inner neck 14, an inner body shoulder 15, and an inner body 16 are formed sequentially from top to bottom. The edge of the neck rim 12 has an annular arcuate protrusion 121. The outer diameter of the neck layer 13 is smaller than the outer diameter of the neck rim 12. The outer diameter of the inner neck 14 is smaller than the outer diameters of the neck layer 13 and the inner body shoulder 15. The neck rim 12 and the neck layer 13 have at least one air inlet 17 communicating with the inner neck. In the illustration, there are three air inlets 17, evenly distributed on the neck rim 12 and the neck layer 13. The inner shoulder 15 includes several longitudinal first ribs 151 and several longitudinal second ribs 152, with each second rib 152 located between two adjacent first ribs 151. The wall thickness of each first rib 151 is greater than that of each second rib 152. A groove 153 is formed between each of the first ribs 151 and the second ribs 152, and the groove 153 connects to the inner neck 14 and the inner body 16.

[0056] like Figures 6 to 9 The outer preform 20 is a tubular body with a closed bottom and an open top, comprising, from top to bottom, an outer bottle neck 21, an outer bottle neck 22, a partition ring 23, a stop ring 24, an outer preform shoulder 25, and an outer preform body 26. The inner wall of the outer bottle neck 21 is provided with an upward-opening receiving groove 211, and the vertical wall of the receiving groove 211 is provided with an annular arcuate recess 212. The inner wall of the outer preform 20 is provided with several longitudinal flow guide grooves 27, which extend upward from the outer preform shoulder 25 to the outer bottle neck 21. The outer bottle neck 22 is provided with an external thread 222 with a notch 221. The thickness of the outer preform 20 is greater than the thickness of the inner preform 10. The wall thickness of the outer preform shoulder 25 and the outer preform body 26 is 1.5 to 2 times the wall thickness of the inner preform shoulder 15 and the inner preform body 16.

[0057] like Figures 11 to 14 The inner preform 10 is fitted inside the outer preform 20 to form a double-walled preform tube 1. The air inlet 17, the bottle neck layer 13, the inner neck 14, the groove 153 of the inner preform 10, and the guide groove 27 of the outer preform 20 form an airflow passage 28. Because the first rib 151 of the inner preform 10 is thicker, it contacts the inner wall of the shoulder 25 of the outer preform; because the second rib 152 of the inner preform 10 is thinner, it maintains an air gap 29 with the inner wall of the shoulder 25 of the outer preform, and the air gap 29 connects to the airflow passage 28. Figure 11 The receiving groove 211 of the outer blank 20 receives the bottle mouth rim 12 of the inner blank 10, and the arc protrusion 121 and the arc concave 212 limit each other. Figure 12 The air inlet 17 of the endoderm 10 is connected to the airflow passage 28.

[0058] like Figure 23 The double-walled preform 1 is manufactured into a double-walled container 3 using known injection blow molding or injection stretch blow molding methods. The double-walled container 3 includes a bottle neck 30. The bottle neck 30 is composed of the inner bottle neck 11, the bottle neck rim 12, the air inlet 17, the bottle neck layer 13, the inner bottle neck 14, the outer bottle neck 21, the external thread 22, the separator ring 23, and the stop ring 24 of the inner preform 10 and the outer preform 20; the bottle neck 30 is for connection with the pneumatically controlled check flap 4.

[0059] The inner preform shoulder 15 and the inner preform body 16 are blow-molded into an inner bottle shoulder 311 and an inner bottle 31, while the outer preform shoulder 25 and the outer preform body 26 are blow-molded into an outer bottle shoulder 34 and an outer bottle 32. During blow molding, the arcuate protrusion 121 and arcuate concave concavity 212 of the inner bottle opening 11 and the outer bottle opening 21 form point-like welds (not shown). The first rib 151 of the inner preform shoulder 15, due to its contact with the inner wall of the outer preform shoulder 25, can also form point-like welds during blow molding (not shown). However, because the second rib 152 does not contact the inner wall of the outer preform shoulder 25, the aforementioned airflow passage 28 is not closed or interrupted by the welds. The groove 153 of the inner preform shoulder 15 still exists in the inner bottle shoulder 311 and is enlarged due to blow molding. The bottom center point of the inner bottle 31 is welded to the bottom center point of the outer bottle 32. The height of the double-walled container 3 is between 100 mm and 250 mm. The wall thickness of the outer bottle 32 is 0.20–0.50 mm, and the thickness of the inner bottle 31 is 0.05–0.25 mm. There is a pressure space 33 between the inner bottle 31 and the outer bottle 32. The airflow passage 28 of the double-walled embryo tube 1 is still retained in the double-walled container 3 and is connected to the pressure space 33.

[0060] The outer bottle 32 has a conical outer shoulder 34, and its cross-sectional shape orthogonal to the central axis is circular or polygonal with rounded corners. The middle section 35 of the outer bottle 32 has a circular cross-sectional shape orthogonal to the central axis, and its outer wall is provided with axial ribs 351. The lower section 36 of the outer bottle 32 has a circular cross-sectional shape orthogonal to the central axis. A concave ring 37 is formed at the junction of the middle section 35, the outer shoulder 34, and the lower section 36. The inner bottle 31 can be formed into a cylindrical shape or corresponding to the shape of the outer bottle 32.

[0061] Figure 23 and Figure 24 The structure and shape of the outer bottle 32 allow it to be pressed and spring back to its original shape in the middle section 35. Pressing the outer bottle 32 causes the inner bottle 31 to undergo a volume reduction deformation. Due to the thinness of its wall, the inner bottle 31 does not return to its original shape after the volume reduction deformation, thereby achieving excellent compressibility. The pressing operation and bottle deformation will be described in detail later.

[0062] like Figures 15 to 21 The pneumatically controlled check valve 4, which is attached to the bottle opening 30 of the double-walled container 3, includes: a cap body 41, a connecting hinged cap 40 connected to the cap body 41, a check valve 50 disposed in the cap body 41, and a dispensing component 60 disposed in the cap body 41.

[0063] like Figure 15 and Figure 16 The cover body 41 is a plastic molded part, including a top 42 and a skirt 43 perpendicularly connected to the outer circle of the top 42. The skirt 43 is provided with an internal thread 432 having a notch 431. The lower surface of the top 42 has an outer sealing ring 443, a short sealing ring 442, and a long sealing ring 441 concentrically arranged from the outside in. The top 42 is divided into an annular air groove 47 and an annular mounting groove 48 by a concentric annular sidewall 45 and a partition wall 46. The annular air groove 47 surrounds the annular mounting groove 48, and the annular mounting groove 48 surrounds a support surface 49 located at the center of the top 42. The inner surface of the annular sidewall 45 is provided with a recessed first locking portion 451. The annular air groove 47 has an air passage hole 471 at a position close to the skirt 43 and avoiding the short sealing ring 442. The partition wall 46 has a notch 461 corresponding to the air passage 471. The height of the supporting surface 49 is higher than the top edge height of the partition wall 46 and the annular sidewall 45. The supporting surface 49 is an arc concave surface, and an injection hole 491 is provided at the lowest point of the center of the arc concave surface.

[0064] like Figure 15 , Figure 17The check valve 50 is an elastic plastic molded part that can physically deform and return to its original shape. The check valve 50 includes an annular base 51, which includes an outer annular wall 52 and an inner annular wall 53. The inner annular wall 53 is higher than the outer annular wall 52, forming an annular groove 54 between the inner and outer annular walls 53 and 52. A thin, horizontally extending, sheet-like valve 55 that can move elastically up and down is provided in a portion of the outer annular wall 52. The top of the inner annular wall 53 surrounds and connects a thin-film valve plate 57, which has the elasticity to bulge up and down. Several peripheral injection holes are provided around the periphery of the valve plate 57.

[0065] like Figure 19 and Figure 21 The check valve 50 is mounted in the annular mounting groove 48 of the cover body 41 with the annular base 51. The valve plate 57 is in a downward arc-shaped concave position and contacts the support surface 49 of the cover body 41 to seal the injection hole 491. The valve 55 is located in the recess 461 of the cover body 41 and extends into the annular gas groove 47.

[0066] like Figure 15 and Figure 18 The dispensing part 60 is a plastic molded part, including a horizontal cover 61, an annular insert wall 62 formed near the center of the bottom surface of the cover 61, an annular fastening wall 63 formed near the periphery of the bottom surface of the cover 61, a crown-shaped part 64 formed at the center of the cover 61 with an upward protrusion and hollow interior, and a dispensing nozzle 641 formed on the top surface of the crown 64 and penetrating the crown 64. The outer side of the annular fastening wall 63 is provided with a protruding second locking part 631. The cover 61 is provided with an air inlet 611.

[0067] like Figure 20 and Figure 21 The dispensing member 60 is engaged with the first locking portion 451 of the annular sidewall 45 of the cap body 41 by the second locking portion 631 of the annular fastening wall 63, thereby fixing the dispensing member 60 to the cap body 41. The air inlet 611 is positioned relative to the annular air groove 47 of the cap body 41, and the valve 55 is stationary below the air inlet 611 and shields (but does not tightly seal) the air inlet 611. The annular embedded wall 62 of the dispensing member 60 is embedded in the embedded groove 54 of the check valve 50, thereby fixing the check valve 50 between the cap body 41 and the dispensing member 60. The crown portion 64 surrounds the peripheral dispensing hole 56 and the valve plate 57 of the check valve 50, and a distance is maintained between the crown portion 64 and the peripheral dispensing hole 56 and the valve plate 57, allowing the valve plate 57 to elastically move up and down.

[0068] like Figure 22The pneumatically controlled check flap 4 is connected to the bottle opening 30 of the double-walled container 3. The internal thread 432 of the pneumatically controlled check flap 4 is tightened with the external thread 222 of the outer bottle opening 21. The outer sealing ring 443 of the pneumatically controlled check flap 4 is tightly fitted to the outer corner of the outer bottle opening 21. The short sealing ring 442 tightly seals the top edge of the outer bottle opening 21 but does not seal the air inlet 17. The long sealing ring 441 extends into and fits tightly against the inner wall of the inner bottle opening 11. The outer sealing ring 443, the short sealing ring 442, and the long sealing ring 441 ensure the airtightness of the inner bottle 31 and the bottle opening 30, so that air in the airflow passage 28 will not leak out of the bottle opening. The valve plate 57 of the check valve 50 is tightly attached to the support surface 49 of the cap body 41, and the injection hole 491 and the peripheral injection hole 56 are sealed, preventing external air from entering the inner bottle 31.

[0069] The pneumatically controlled check valve cover 4 and the double-walled container 3 share a continuous airflow channel. This airflow channel is formed by connecting the air inlet 611 of the dispensing component 60, the annular air groove 47 of the cover body 41, the air passage 471 of the cover body 41, and the airflow passage 28 of the double-walled container 3. This airflow channel connects to the pressure space 33 of the double-walled container 3.

[0070] like Figure 24 and Figure 25 When in use, the double-walled container 3 is tilted downwards with the pneumatically controlled check valve 4 facing down. The user holds and squeezes the middle section 35 of the outer bottle 32. Based on the step 37 of the outer bottle 32, the deformation area of ​​the outer bottle 32 is controlled in the middle section 35, and the outer shoulder 34 and the lower section 36 of the outer bottle 32 will not deform. In addition, the step 37 of the outer bottle 32 and the axial ribs 351 control the amount of inward deformation of the middle section 35 when squeezed, avoiding excessive deformation that could lead to breakage or loss of elastic recovery.

[0071] When the outer bottle 32 is squeezed, the air pressure space 33 of the double-walled container 3 and the air in the air flow channel (indicated by small arrows in the figure) are also squeezed. In particular, the air pressure generated by the compressed flow of air in the air flow channel will push the valve 55 of the check valve 50 from the inside, so that the valve 55 tightly closes the air inlet 611 of the dispensing part 60, preventing air from being released outward, thereby maintaining the amount and pressure of air in the air pressure space 33 and the air flow channel.

[0072] Under the pressure of the outer bottle 32, the inner bottle 31 undergoes a volume reduction deformation. The contents 90 (represented by arrows filled with fine dots in the figure) push the valve plate 57 from the dispensing hole 491 of the cap body 41. The valve plate 57 elastically deforms and arches away from the supporting surface 49. The arched valve plate 57 opens the dispensing hole 491 and the peripheral dispensing hole 56, and the contents 90 flow out to the dispensing nozzle 641 through the peripheral dispensing hole 56.

[0073] like Figure 26 and Figure 27 When the pressure on the middle section 35 of the outer bottle 32 is released, the middle section 35 elastically returns to its original shape, and the previously compressed air pressure space 33 is released and expanded. The air in the airflow channel flows back into the air pressure space 33. The suction generated by the air flow causes the valve 55 to release the air inlet 611. External air passes through the air inlet 611 and pushes open the valve 55, entering the air pressure space 33 through the airflow channel, filling the air pressure space 33 with air. Due to the thinness of its bottle wall, the release of its contents 90, and the air pressure in the air pressure space 33, the inner bottle 31 will not recover from its reduced volume deformation. At the same time as the pressure on the outer bottle 32 is released, the contents 90 of the inner bottle 31 stop being released outward, and the valve plate 57 of the check valve 50 returns to a state of contact with the support surface 49. The injection port 491 and the peripheral injection port 56 are closed, and external air will not enter the inner bottle 31.

[0074] like Figure 28 and Figure 29 Based on the above principle, repeatedly squeezing the middle section 35 of the outer bottle 32 causes the outer bottle 32 to deform inward, compressing the air in the air pressure space 33. This air pressure is then used to squeeze the inner bottle 31, causing the contents 90 of the inner bottle 31 to be released outward. The more contents 90 are released, the greater the volume reduction deformation of the inner bottle 31 (the smaller the inner bottle 31 becomes), and the larger the air pressure space 33 becomes, thus containing more air. When the user squeezes the middle section 35 of the outer bottle 32 with the same force, the outer bottle 32 can generate sufficient air pressure to squeeze out the contents 90 of the inner bottle 31 with the same amount of deformation. As the contents 90 of the inner bottle 31 decrease, the user does not need to increase the force of squeezing the outer bottle 32, nor does the outer bottle 32 need to increase the amount of deformation, to still squeeze the contents 90 out of the inner bottle 31, eventually reaching a state of near-emptiness.

[0075] To facilitate the explanation of the changes in double-walled containers, therefore Figure 24 , Figure 26 , Figure 28 , Figure 29 Omitted Figure 25 The detailed structure described in the text.

[0076] The above description describes the preferred embodiments of the present invention and the technical principles applied thereto. For those skilled in the art, any obvious changes such as equivalent transformations or simple substitutions based on the technical solutions of the present invention, without departing from the spirit and scope of the present invention, shall fall within the protection scope of the present invention.

Claims

1. A pneumatically controlled check flap integrated into a double-walled container, the double-walled container being made of a double-walled tube; This double-walled embryonic tube includes: One endoderm and one ectoderm; The endometrium is a tubular body formed by plastic molding, with a closed bottom and an open top; It includes an inner bottle mouth, and a bottle mouth rim extending radially outward from the inner bottle mouth. Below the bottle mouth rim, a bottle mouth layer, an inner bottle neck, an inner bob shoulder, and an inner bob body are sequentially formed. The outer diameter of the inner bottle neck is smaller than the outer diameter of the bottle mouth layer and the inner bob shoulder. The preform is a plastic molded tubular body with a closed bottom and an open top, which includes, from top to bottom, an outer bottle mouth, an outer bottle neck, a stop ring, an outer preform shoulder, and an outer preform body; the inner wall surface of the outer bottle mouth is provided with an upward-opening receiving groove; the outer bottle neck is provided with an external thread with a notch. The inner wall of the preform is provided with several longitudinal flow channels, which extend upward from the shoulder of the preform to the mouth of the outer bottle; The bottle neck and the bottle neck layer have at least one air inlet that connects to the inner neck; the inner shoulder includes several longitudinal first ribs and several longitudinal second ribs, the second ribs being located between two adjacent first ribs; a groove is formed between each of the first ribs and the second ribs, the grooves connecting to the inner neck and the inner body. The inner preform is fitted inside the outer preform, and the receiving groove receives the bottle mouth rim; The air inlet, the inner bottleneck, the groove, and the guide channel of the endode form an airflow passage; The double-walled container includes: A bottle mouth portion is formed by the inner bottle mouth, the bottle mouth rim, the air inlet, the bottle mouth layer, the inner bottle neck, the outer bottle mouth, the external thread, and the stop ring; An inner bottle shoulder and an inner bottle are blow-molded from the inner preform shoulder and the inner preform body, and an outer bottle shoulder and an outer bottle are blow-molded from the outer preform shoulder and the outer preform body. The first rib and the second rib form a point-like fusion with the inner wall of the outer bottle shoulder. The bottom center point of the inner bottle is fused with the bottom center point of the outer bottle. When the outer bottle is subjected to external pressure, it deforms inward and can elastically return to its original shape. When the inner bottle is squeezed, it gradually reduces its volume and deforms, and does not return to its original shape. There is a pressure space between the inner bottle and the outer bottle; the airflow passage of the double-walled embryo tube is still retained in the double-walled container and is connected to the pressure space; The pneumatically controlled non-return cover includes: A cover body, a hinged cover connected to the cover body, a check valve disposed in the cover body, and a dispensing component disposed in the cover body; The cap body is a plastic molded part, including a top and a skirt that is perpendicularly connected to the periphery of the top; the lower surface of the top is provided with an outer sealing ring, a short sealing ring and a long sealing ring from the outside to the inside, all concentrically; the skirt is provided with an internal thread with a notch, and a ring buckle is provided on the inner side of the skirt near the bottom end; the top is provided with an annular mounting groove; the annular mounting groove surrounds a support surface; and an injection hole is provided at the center of the support surface. The check valve is an elastic plastic molded part that can physically deform and return to its original shape; the check valve includes an annular base, which surrounds and connects a valve plate that can elastically move up and down, and the valve plate has a peripheral injection hole on its periphery; the check valve is installed in the annular mounting groove of the cover body with the annular base, and the valve plate contacts the support surface and seals the injection hole; The dispensing component is installed in the cap body, and the check valve is fixed between the cap body and the dispensing component; the dispensing component includes a dispensing nozzle. The cap body is screwed into the external thread of the bottle opening by the internal thread; the outer sealing ring of the pneumatic check cap is tightly fitted to the outer corner of the outer bottle opening, the short sealing ring is tightly sealed to the top edge of the outer bottle opening, and the long sealing ring extends into and is tightly fitted to the inner wall of the inner bottle opening. Its features are: The top is provided with an annular air groove, and the annular air groove is provided with an air passage hole; The annular base extends radially outward horizontally into a thin, elastically movable valve. The valve extends into the annular air groove; The injection device has an air inlet at the position corresponding to the valve, and the valve is stationary below the air inlet of the injection device, and the valve covers the air inlet of the injection device. The air inlet of the injection component, the annular air groove of the cover body, the air passage of the cover body, and the airflow passage of the double-walled container are connected to form an airflow channel, which is connected to the air pressure space of the double-walled container.

2. A double-walled container, the double-walled container comprising: An inner bottle opening and an outer bottle opening, wherein the outer bottle opening surrounds the inner bottle opening; An inner bottle neck extends radially outward from the inner bottle opening. Below the inner bottle neck is formed an inner bottle shoulder, and below the inner bottle shoulder is formed an inner bottle layer. The inner wall of the outer bottle opening is provided with an upward-opening receiving groove, which receives the bottle neck and forms a point-like weld. The outer wall of the outer bottle opening is provided with an external thread with a notch. Below the external thread is formed an outer bottle shoulder, and below the outer bottle shoulder is formed an outer bottle layer. When the outer bottle layer is subjected to external pressure, it deforms inward and can elastically return to its original shape. When the inner bottle layer is squeezed, it gradually reduces its volume and deforms, and does not return to its original shape. A pneumatically controlled check cap is attached to the outer bottle opening. The pneumatically controlled check cap includes a cap body, a connecting hinged cap connected to the cap body, a check valve disposed in the cap body, and a dispensing component disposed in the cap body. The cap body is a plastic molded part, including a top and a skirt that is perpendicularly connected to the periphery of the top; the lower surface of the top is provided with an outer sealing ring, a short sealing ring and a long sealing ring from the outside to the inside and concentrically; the top is provided with an annular mounting groove; the annular mounting groove surrounds a support surface; the center of the support surface is provided with an injection hole; The check valve is an elastic plastic molded part that can physically deform and return to its original shape; the check valve includes an annular base; the annular base surrounds and connects a valve plate that can be elastically moved up and down, and the valve plate has a peripheral injection hole on its periphery; the check valve is installed in the annular mounting groove of the cover body with the annular base, and the valve plate contacts the support surface and seals the injection hole; The dispensing component is installed in the cap body, and the check valve is fixed between the cap body and the dispensing component; the dispensing component includes a dispensing nozzle. The cap body is screwed into the external thread of the outer bottle opening with an internal thread; the outer sealing ring of the pneumatic check cap is tightly fitted to the outer corner of the outer bottle opening, the short sealing ring is tightly sealed to the top edge of the outer bottle opening, and the long sealing ring extends into and is tightly fitted to the inner wall of the inner bottle opening. Its features are: The inner bottle shoulder is formed with several longitudinal grooves; the bottle mouth rim is provided with at least one air inlet that connects to the inner bottle neck; The inner wall of the outer bottle opening is provided with several longitudinal flow guide grooves, which extend to the outer bottle shoulder; there is a pressure space between the inner bottle and the outer bottle; the air inlet, the inner bottle neck, the groove and the flow guide groove form an airflow passage, which connects to the pressure space. The internal thread of the cover body has several notches; The top of the cover body is provided with an annular air groove, and the annular air groove is provided with an air passage hole; The annular base extends radially outward horizontally into a thin, elastically movable valve; the valve extends into the annular air groove; The injection device has an air inlet at the position corresponding to the valve, and the valve is stationary below the air inlet of the injection device, and the valve covers the air inlet of the injection device. The air inlet of the dispensing component, the annular air groove of the cap body, the air passage of the cap body, and the airflow passage of the double-walled container are connected to form an airflow channel, which is connected to the air pressure space of the double-walled container.

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